Depending on your ability to learn and put time into it and your creativity probably not too long.

Six step probably easily mastered after a couple of days to do it quickly and comfortably.

Master swipe I give it a few hours max.

You need to learn the six step and get it down easily. Then you can learn the swipe/master swipe and practice converting from six step to master swipe which is a decent footwork conversion.

After that you'd want to learn the Nike and then the Hike and if you can hold yourself in the air with some flexibility try the Nike->Hike conversion.

You have to be pretty strong to do the nike and hike since it requires hand stands and well one handed handstands.

The difficulty level is normally Flare/Windmill -> Windmill/Flare -> Air Flare. These are the major flashy power moves that everybody wants to do. I suggest you being able to do a split or atleast semi-close to it if you want to pull off the first two. The air flare is hard as hell to learn.